Jordanus de Nemore, [Liber de ratione ponderis], 1565

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              <p>
                <s id="id.2.25.02.03">
                  <pb xlink:href="049/01/025.jpg"/>
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                <s id="id.2.26.00.01">Quaestio uigesimaquinta.
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                </s>
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              <p>
                <s id="id.2.26.01.01">Si uero sub regula centrum designetur, uix continget in hoc
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                situ stabiliri pondera.
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                </s>
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                <s id="id.2.26.02.01">
                  <figure id="id.049.01.025.1.jpg" xlink:href="049/01/025/1.jpg" number="35"/>
                Sit Responsa ut prius a, b, c, et
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                perpendiculum d, b, e, sitque e, cen
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                trum sub Responsa, et pondera a,
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                et c, ductis igitur lineis e, a, e, c, qua
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                si inde ipsis, sint, sic sita sunt ponde­
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                ra. </s>
                <s id="id.2.26.02.02">ipsius igitur in hoc situ aeque pon­
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                derantibus si fiat qualitercunque nu­
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                tus in alterutra partium ueluti in a,
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                crescet ex parte a, portio. Responsae
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                usque ad rectitudinem quae signetur
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                h, l, 3, ut sit communis sectio ipsius, et
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                regulae in l,</s>
                <s id="id.2.26.02.03"> sicque grauius reddetur con
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                tinue donec circumuoluatur regu­
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                la sub e. </s>
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            <subchap1>
              <p>
                <s id="id.2.27.00.01">Quaestio uigesimasexta.
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                </s>
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              <p>
                <figure id="id.049.01.025.2.jpg" xlink:href="049/01/025/2.jpg" number="36"/>
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              <p>
                <s id="id.2.27.01.01">Possibile est igitur Respon­
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                sa aeque distantis collocata quan
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                tumlibet pondus in alterutra
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                parte suspendere, quae regulam
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                ab aequalitate non separet.
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                </s>
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              <p>
                <s id="id.2.27.02.01">Sic regula a, b, c, centrum b, linea
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                directionis d, b, e, sitque Responsa
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                suo pondere in aequalitate sita.
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                </s>
                <s id="id.2.27.02.02">Sumatur igitur alia Responsa aequa
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                lis grossiciei, et ponderis, quae sit h, t,
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                3, posito t, in eius medio, sitque portio
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                regulae h, b, in utralibet parte minor
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                longitudine quam sit h, t, et pendeat regula h, t, 3, ab h, fixa ut t, sit in dire
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                cto sub b, secta a linea directionis in t, dico ergo ipsa ita dependens non fa­
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                ciet mutare literam, sita est enim quasi si traheretur linea b, 3, et in ipsa
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                linea b, h, dependeret omnesque partes eius aequaliter a, t, distantes aeque
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                ponderarent, distant enim aequaliter a linea directionis, quia t, 3, ponde­
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                rant, quantum b, t, t, h, non ergo fiet nutus, sed et super hoc si quolibet pon
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                dus suspendatur a, t, non faciet, hinc uel inde nutum.</s>
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